Revenues By Geographic Area (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Total consolidated revenues	$ 5,880	$ 5,614	$ 11,359	$ 11,001
United States
Segment Reporting Information [Line Items]
Total consolidated revenues	3,056	2,963	5,890	5,795
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Total consolidated revenues	1,669	1,486	3,261	2,963
Asia Pacific And Japan
Segment Reporting Information [Line Items]
Total consolidated revenues	802	835	1,525	1,573
Latin America, Mexico And Canada
Segment Reporting Information [Line Items]
Total consolidated revenues	$ 353	$ 330	$ 683	$ 670